Specifications ispLSI 5256VE 18 Power Consumption setting operates product terms at their normal full power consumption. For portions of the lo" />
參數資料
型號: ISPLSI 5256VE-80LT100I
廠商: Lattice Semiconductor Corporation
文件頁數: 10/24頁
文件大?。?/td> 0K
描述: IC PLD ISP 144I/O 12NS 100TQFP
標準包裝: 90
系列: ispLSI® 5000VE
可編程類型: 系統(tǒng)內可編程
最大延遲時間 tpd(1): 12.0ns
電壓電源 - 內部: 3 V ~ 3.6 V
邏輯元件/邏輯塊數目: 8
宏單元數: 256
門數: 12000
輸入/輸出數: 72
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-LQFP
供應商設備封裝: 100-TQFP(14x14)
包裝: 托盤
其它名稱: ISPLSI5256VE-80LT100I
Specifications ispLSI 5256VE
18
Power Consumption
setting operates product terms at their normal full power
consumption. For portions of the logic that can tolerate
longer propagation delays, selecting the slower “l(fā)ow-
power” setting will reduce the power dissipation for these
product terms. Figure 10 shows the relationship between
power and operating frequency.
Power consumption in the ispLSI 5256VE device de-
pends on two primary factors: the speed at which the
device is operating and the number of product terms
used. The product terms have a fuse-selectable speed/
power tradeoff setting. Each group of five product terms
has a single speed/power tradeoff control fuse that acts
on the complete group of five. The fast “high-speed”
175
025
5075
100
125
150
175
200
fmax (MHz)
I CC
(mA)
Notes: Configuration of 16 16-bit Counters
Typical Current at 3.3V, 25° C
ispLSI 5256VE
High Speed Mode
ispLSI 5256VE
Low Power Mode
0127/5256VE
ICC can be estimated for the ispLSI 5256VE using the following equation:
High Speed Mode: ICC = 21 + (# of PTs * 0.313) + (# of nets * Fmax * 0.00282)
Low Power Mode: ICC = 21 + (# of PTs * 0.258) + (# of nets * Fmax * 0.00282)
# of PTs = Number of Product Terms used in design
# of nets = Number of Signals used in device
Fmax = Highest Clock Frequency to the device
The ICC estimate is based on typical conditions (VCC = 3.3V, room temperature) and an assumption of one GLB load
on average exists. These values are for estimates only. Since the value of ICC is sensitive to operating conditions
and the program in the device, the actual ICC should be verified.
225
275
300
250
200
150
Figure 10. Typical Device Power Consumption vs fmax
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